Add time:08/29/2019 Source:sciencedirect.com
The barbital (Bar) is one of the barbituric acid derivatives. It possesses a potent sedative-hypnotic property. Structural, thermal and morphological properties of the charge transfer (CT) products obtained from the reaction of barbital (Bar) with chloranilic acid (CLA), chloranil (CHL), TCNQ and DBQ π-acceptors were reported. The products were prepared in methanol media, isolated and fully characterized spectroscopically, thermally and morphologically using IR, 1H NMR, Raman, UV–Vis., TG, XRD and SEM techniques. Experimental results obtained by spectroscopic titrations and elemental analysis suggested that the reaction stoichiometry is 1:1, and the synthesized products were [(Bar)(CLA)], [(Bar)(CHL)], [(Bar)(TCNQ)], and [(Bar)(DBQ)]. The complexation of Bar with CHL, TCNQ and DBQ acceptor was taking place through n → π* interaction, while its complexation with CLA acceptor was taking place by the formation of intermolecular hydrogen bond. Formation of the products was thermally stable as indicated by the TG analysis. SEM and XRD analyses indicate that the products possess uniform microstructures with well-organized nano-sized particles having a main diameter in the range around ~50 nm.
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